Dans la chaleur de St-Tropez (1981) (Marilyn Jess,Alpha France)

Marilyn Jess goes on holiday to St Tropez with her friend Mika Barthel. They meet a group of people making a porn film and Marilyn gets filmed having sex in the changing rooms of a tennsi club and at a party, among other places. Cathy Ménard plays a porn actress, seen only in the first scene buried up to her neck in the sand and giving head to Olinka and Jean-Pierre Armand while being filmed by Alban. The blonde on the boat is probably Veronica Celes.